1223340 has 24 divisors (see below), whose sum is σ = 3425520. Its totient is φ = 326208.

The previous prime is 1223329. The next prime is 1223351. The reversal of 1223340 is 433221.

1223340 = 155² + 156² + ... + 194².

1223340 is nontrivially palindromic in base 8.

It is an interprime number because it is at equal distance from previous prime (1223329) and next prime (1223351).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an Ulam number.

It is a plaindrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10135 + ... + 10254.

It is an arithmetic number, because the mean of its divisors is an integer number (142730).

2^1223340 is an apocalyptic number.

1223340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223340 is an abundant number, since it is smaller than the sum of its proper divisors (2202180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1223340 is a wasteful number, since it uses less digits than its factorization.

1223340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20401 (or 20399 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 1223340 is about 1106.0470152756. The cubic root of 1223340 is about 106.9503948014.

Adding to 1223340 its reverse (433221), we get a palindrome (1656561).

The spelling of 1223340 in words is "one million, two hundred twenty-three thousand, three hundred forty".